First release of immujson library

The first release of the project - alpha version.

• immutable JSON objects and manipulation with them
• parse and serialize + ability to work with a custom stream (not limited to iostreams only )
• simple JSON compression
• path reference
• easy editing with operation "commit changes + autocommit objects
• support initializer_lists {...}
• support C++ 11 features
• no 3rd party library dependencies, only STL.
• tests
• doxygen
• compiled under linux(gcc) and windows(msvc)

what missing

• no practical experience with the library in a real project